Alert archive / New York / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 22, NWS Buffalo, NY

May 21, 2013Livingston County, Wyoming County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 21, 2013, 4:11 PM EDT for Livingston County, Wyoming County, New York. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 21, 2013, 4:11 PM EDT (20:11 UTC)
Expired: May 21, 2013, 5:00 PM EDT
In force: 49 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Livingston County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 58 km from the middle of the area, began a volume at 20:11 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 21, 1:40 PM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 8.2 hours before the alert went out and 55 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1788 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 804 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 173 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

322 
WUUS51 KBUF 212011
SVRBUF
NYC051-121-212100-
/O.NEW.KBUF.SV.W.0022.130521T2011Z-130521T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
411 PM EDT TUE MAY 21 2013

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN LIVINGSTON COUNTY IN WESTERN NEW YORK
  WYOMING COUNTY IN WESTERN NEW YORK

THIS ALSO INCLUDES INTERSTATE 390 BETWEEN EXITS 6 AND 7.

* UNTIL 500 PM EDT

* AT 405 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 9 MILES
  SOUTHWEST OF WARSAW...OR 18 MILES SOUTHEAST OF EAST AURORA...AND
  MOVING EAST AT 35 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  WARSAW...
  PERRY...
  MOUNT MORRIS...
  GENESEO...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR WESTERN NEW YORK.

&&

LAT...LON 4270 7838 4287 7805 4287 7796 4290 7796
      4291 7793 4293 7793 4294 7791 4266 7765
      4257 7832
TIME...MOT...LOC 2011Z 253DEG 28KT 4268 7823

$$

SMITH

3 follow-up statements

608 
WWUS51 KBUF 212019
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
419 PM EDT TUE MAY 21 2013

NYC051-121-212100-
/O.CON.KBUF.SV.W.0022.000000T0000Z-130521T2100Z/
LIVINGSTON NY-WYOMING NY-
419 PM EDT TUE MAY 21 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR NORTHEASTERN WYOMING AND CENTRAL LIVINGSTON COUNTIES...

AT 415 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR WARSAW...OR 21 MILES WEST OF GENESEO...MOVING EAST AT 30
MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  SILVER SPRINGS...
  PERRY...
  PERRY...
  LEICESTER...
  GENESEO...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR WESTERN NEW YORK.

&&

LAT...LON 4270 7826 4283 7803 4291 7789 4271 7771
      4263 7819
TIME...MOT...LOC 2019Z 253DEG 28KT 4270 7815

$$

SMITH

187 
WWUS51 KBUF 212035
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
435 PM EDT TUE MAY 21 2013

NYC051-121-212100-
/O.CON.KBUF.SV.W.0022.000000T0000Z-130521T2100Z/
LIVINGSTON NY-WYOMING NY-
435 PM EDT TUE MAY 21 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR EAST CENTRAL WYOMING AND CENTRAL LIVINGSTON COUNTIES...

AT 429 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.
 THIS STORM WAS LOCATED NEAR PERRY...OR 11 MILES SOUTHWEST OF
GENESEO...MOVING EAST AT 40 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  MOUNT MORRIS...
  GENESEO...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR WESTERN NEW YORK.

&&

LAT...LON 4275 7809 4280 7802 4285 7784 4271 7771
      4265 7807
TIME...MOT...LOC 2034Z 256DEG 34KT 4273 7795

$$

SMITH

115 
WWUS51 KBUF 212056
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
456 PM EDT TUE MAY 21 2013

NYC051-121-212106-
/O.EXP.KBUF.SV.W.0022.000000T0000Z-130521T2100Z/
LIVINGSTON NY-WYOMING NY-
456 PM EDT TUE MAY 21 2013

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WYOMING AND
CENTRAL LIVINGSTON COUNTIES WILL EXPIRE AT 500 PM EDT...

AT 456 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD EXITED THE WARNED AREA...
THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR WESTERN NEW YORK.

LAT...LON 4275 7809 4280 7802 4285 7784 4271 7771
      4265 7807
TIME...MOT...LOC 2056Z 256DEG 34KT 4278 7767

$$

TMA

The office that day

Everything else NWS Buffalo, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 20, 10:53 PM EDT	Special Marine Warning	BUF		52 min
May 20, 11:02 PM EDT	Special Weather Statement	BUF	Niagara	43 min
May 21, 12:39 AM EDT	Special Marine Warning	BUF		51 min
May 21, 12:50 AM EDT	Special Marine Warning	BUF		55 min
May 21, 1:01 AM EDT	Special Weather Statement	BUF	Oswego	59 min
May 21, 1:27 AM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	48 min
May 21, 1:40 AM EDT	Special Marine Warning	BUF		50 min
May 21, 1:49 AM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	41 min
May 21, 1:59 AM EDT	Special Weather Statement	BUF	Lewis	61 min
May 21, 2:13 AM EDT	Severe Thunderstorm Warning	BUF	Lewis	32 min
May 21, 12:32 PM EDT	Severe Thunderstorm Warning	BUF	Ontario, Wayne	58 min
May 21, 12:34 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	26 min
May 21, 3:02 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Wayne	58 min
May 21, 3:36 PM EDT	Severe Thunderstorm Warning	BUF	Wayne	54 min
May 21, 3:57 PM EDT	Special Weather Statement	BUF	Wyoming	33 min
May 21, 3:58 PM EDT	Special Marine Warning	BUF		62 min
May 21, 3:58 PM EDT	Severe Thunderstorm Warning	BUF	Monroe	47 min
May 21, 4:47 PM EDT	Special Weather Statement	BUF	Ontario	28 min
May 21, 4:58 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Ontario	47 min
May 21, 5:05 PM EDT	Special Marine Warning	BUF		85 min
May 21, 5:14 PM EDT	Special Marine Warning	BUF		61 min
May 21, 5:22 PM EDT	Special Marine Warning	BUF		83 min
May 21, 5:34 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	56 min
May 21, 5:45 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	15 min
May 21, 5:48 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego	57 min
May 21, 7:14 PM EDT	Special Weather Statement	BUF	Lewis	31 min
May 21, 7:40 PM EDT	Special Marine Warning	BUF		35 min

Nearby

Severe Thunderstorm Warnings in New York, 2013 Every severe thunderstorm warning in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.